Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof

Definitions

• the present invention relates to novel cyclopropanecarboxylic acid esters of the formula ( I ) : wherein R 1 is hydrogen atom or fluorine atom; when R 1 is hydrogen atom, R 2 is hydrogen atom or trifluoromethyl group; when R 1 is fluorine atom, R 2 is hydrogen atom or a halogen atom (e.g. fluorine, chlorine or bromine atom), R 3 is ethynyl or 1-propynyl group, R 4 is a group of the formula (in which X is methyl group or a halogen atom (e.g. fluorine, chlorine or bromine atom)) or (in which Y is a halogen atom (e.g. fluorine, chlorine or bromine atom)), and their production and an insecticidal and acaricidal composition containing them as an active ingredient.
• R 1 is hydrogen atom or fluorine atom
• R 2 when R 1 is hydrogen atom, R 2 is hydrogen
• cyclopropanecarboxylic acid , ester type insecticides are known, and some of such insecticides are found in the list of the pyrethrum compositions.
• those of the pyrethrum compositions are widely used for controlling the sanitary harmful insects and the harmful insects in agriculture and horticulture because of their many advantageous properties such as low toxicity to man and beast, rapid effect on the harmful insects and unlikeliness of making the harmful insects resistant to them in addition to their inherent insecticidal activity.
• These pyrethrum insecticides however, have drawbacks that they are expensive and subject to certain restrictions in the scope of their applications, and hence a plurality of analogous compounds have been synthesized by many scientists. But very few of them are superior to natural pyrethrin or allethrin from the overall aspect of wide application, efficacy and cost.
• the present compounds can be obtained in a high yield by reacting a carboxylic acid represented by the formula (II), (wherein R 4 is as defined above) or a reactive derivative thereof with an alcohol represented by the formula (III), (wherein R l' R 2 and R 3 are as defined above).
• R l' R 2 and R 3 are as defined above.
• the cyclopropanecarboxylic acid esters obtained by the above methods may be purified, if necessary, by chromatography or other means.
• the alcohol represented by the formula (III) which is an intermediate material for the present compounds can be produced according to a method described in J. Am. Chem. Soc., 69, 2017-2018 (1947), and the alcohol of the formula (III) wherein R 1 is hydrogen atom, R 2 is trifluoromethyl group and R 3 is ethynyl group, is described in Chem. Abst., 52, 1502-1503 (1961).
• the compounds may be formulated, like the conventional pyrethroids, into optional formulation forms using carriers or diluents for the common insecticidal and acaricidal composition according to the methods well known to those skilled in the art.
• the formulation forms include for example emulsifiable concentrates, wettable powders, dusts, granules, fine granules, oil sprays, aerosols, heating fumigants (mosquito coils, electric mosquito fumigators), foggings, non-heating fumigants, baits of powder form or solid form containing attractants and other optional forms and the present compounds can be applied to various uses in required formulation forms and using required carriers.
• the insecticidal and acaricidal activity of the present compounds can.be increased by blending with synergists for pyrethroids or other well-known effective synergists for allethrin and pyrethrins.
• the synergists for pyrethroids include for example a-[2-(2-butoxyethoxy)ethoxy]-4,5-methylenedioxy-2-propyltoluene, octachlorodipropyl ether and the other known synergists.
• cyclopropanecarboxylic acid esters tend to be inferior in resistance to light, heat and oxidation, and therefore compositions of more stable effect can be obtained by adding a proper amount of stabilizers.
• the stabilizers include for example antioxidants and ultraviolet absorbers such as phenol derivatives (e.g. BHT, BHA), bisphenol derivatives, arylamines (e.g. phenyl-a-naphthylamine, phenyl-S-naphthylamine, condensation products of phenetidine and acetone), and benzophenone compounds.
• multi-purpose compositions of excellent efficacy can be produced by mixing with other active ingredients for example allethrin, N-(chrysanthemoxymethyl)-3,4,5,6-tetrahydrophthalimide (hereinafter referred to as tetramethrin), 5-benzyl-3-furylmethyl chrysanthemate, 3-phenoxybenzyl chrysanthemate, d-trans or d-cis,trans isomers of these chrysanthe- mates, pyrethrum extracts, d-trans or d-cis,trans chrysanthemic esters of d-allethrolone, and other well-known pyrethroids, organophosphorus insecticides such as 0,0-dimethyl 0-(3-methyl-4-nitrophenyl)phosphorothioate, 0,0-dimethyl 0-4-cyanophenylphosphorothioate, 0,0-dimethyl 0-(2,2-dichlorovinyl)phosphate;
• compositions generally contain 0.05 to 95.0 % by weight, preferably 0.1 to 80.0 % by weight, of the active ingredient (including other ingredients mixed). Since, however, the amount and concentration of the active ingredient depend upon the formulation forms, application time, application techniques, application sites, pest and crops, they may properly be increased or decreased irrespective of the aforesaid ranges.
• composition and effect of the insecticides and acaricides of the present invention will be illustrated with reference to the following formulation examples and test examples.
• a solution 0.4 Part of the compound No. 4, 0.2 part of tetramethrin, 7 parts of xylene and 7.4 parts of deodorized kerosene are well mixed to make a solution.
• the solution is filled in an aerosol container. After attaching a valve portion to the container, 85 parts of a propellant (liquefied petroleum gas) is charged therein under pressure through the valve to obtain the aerosol.
• a propellant liquefied petroleum gas
• Test example 1 Insecticidal activity against housefly.
• the 20 % emulsifiable concentrate of each of the compounds Nos. 1 to 18 obtained by the method described in Formulation example 1 was diluted 400 times with water (corresponding to 500 ppm of active ingredient).
• Test example 2 Insecticidal activity against brown planthopper.
• -400-Fold aqueous dilutions (corresponding to 500 ppm of active ingredient) were prepared from the 20 % emulsifiable concentrates obtained by the method in Formulation example 1 and from those of reference compounds obtained according to the comparable formulation.
• each dilution was sprayed to rice plants, grown in a 180 ml plastic pot and about one month old from the sowing, at a rate of 15 ml/2 pots. After air-drying, each pot was covered with a wire cage and about 15 adult brown planthoppers were released in the cage. After 24 hours the numbers of dead and alive were counted.
• the insects were released in the cage after 3 days and 7 days from the spraying and the numbers of dead and alive were counted after 24 hours from the release of insects. The results were as shown in the Table 3 and Table 4.
• Test example 3 Insecticidal activity against smaller brown planthopper.
• the 20 % emulsifiable concentrate of the compound of this invention obtained in Formulation example 1 was diluted 400-fold with water (corresponding to 500 ppm of active ingredient). Rice seedlings were dipped into the dilution for one minute. After air-drying, the seedlings were placed in a test tube. Adult smaller brown planthoppers were released into the test tube and the numbers of dead and alive were counted after 24 hours, to obtain the results as shown in the following Table 5.

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• Life Sciences & Earth Sciences (AREA)
• Agronomy & Crop Science (AREA)
• Pest Control & Pesticides (AREA)
• Plant Pathology (AREA)
• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Dentistry (AREA)
• General Health & Medical Sciences (AREA)
• Wood Science & Technology (AREA)
• Zoology (AREA)
• Environmental Sciences (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

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Citations (2)

• 1981
  • 1981-03-26 JP JP56044965A patent/JPS57158739A/ja active Pending
• 1982
  • 1982-03-24 DE DE8282102457T patent/DE3261168D1/de not_active Expired
  • 1982-03-24 EP EP19820102457 patent/EP0061713B1/fr not_active Expired

Patent Citations (2)

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